Abstract: This invention relates to a rubber toughened composition comprising a) 5 to 50 weight percent of a composition comprising: an ethylene polymer having a composition distribution breadth index of 50% or more and containing 0.1 to about 10 weight percent of an unsaturated acid or anhydride, and an elastomer; and b) 95 to 50 weight percent of a thermoplastic polymer containing a functional group capable of interacting with the unsaturated acid or anhydride.

Abstract: This invention relates to a composition comprising:a) 2 to 50 weight % of an first ethylene alpha-olefin copolymer having a density of 0.86 to 0.91 g/cc, a Melt Index of 150 g/10 min or less and an Mw/Mn of 4 or less modified with an unsaturated acid or anhydride and a second ethylene alpha-olefin copolymer having a 0.86 to 0.925 g/cm.sup.3 and/ or homopolyethylene; andb) 98 to 50 weight percent of a thermoplastic polymer comprising a functional group capable of interacting with the unsaturated acid or anhydride.

Abstract: Compounds having improved properties of processability and elasticity after heat aging for molded and extruded rubber parts can be prepared by utilizing improved processability EPM and/or EPDM rubber with effective amounts of carbon black prepared in a manner such that it has an average particle size of from 70 to 120 nanometers, a particle size distribution including from 40 to 225 nanometers sized particles, a surface area of 16 to 30 m.sup.2 /g as measured by the BET adsorption, and a structure of 90 to 125 as measured by DBP absorption. The EPM and EPDM rubber useful in accordance with the invention will include those multimodal polymer blends that comprise at least two fractions having different molecular weight and, optionally, monomer composition. The invention compounds find particular use in automotive industry parts requiring high temperature tolerance, such as coolant hoses.